Flood Risk Assessments
We deliver flood risk assessments that unlock development potential for projects of all sizes - from single-plot extensions to major infrastructure. Our team evaluates risk from rivers, coastal, surface water, groundwater, and sewers against national and local planning policy.
Evidence that satisfies planners.
We assess flood risk for sites in Flood Zones 2/3, sites over 1 ha in Flood Zone 1, and developments near main rivers. We interpret NPPF Sequential and Exception Tests and translate policy into clear actions.
We keep delivery fast by assigning a dedicated technical lead and a supporting analyst from day one.
Four focused steps that deliver approvals.
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Baseline risk review
We compile EA, SEPA, and local authority datasets and confirm planning triggers.
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Site-specific analysis
We test flood pathways, constraints, and safe access/egress requirements.
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Mitigation design
We propose finished floor levels, storage, and resilience measures that work.
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Planning-ready report
We deliver a concise FRA with clear recommendations and evidence tables.
We bring depth without delay.
- We deliver within 5-10 working days.
- We align with NPPF policy and local guidance.
- We coordinate with drainage and highways teams in-house.
Tools we use
TUFLOW, Flood Modeller Pro, HEC-RAS, Infoworks, and GIS-driven mapping.
Map your site in minutes.
Draw your site boundary and get an instant flood risk and constraints overview tailored to your parcel. Use it to brief your team, test planning viability, and move forward with clarity before commissioning detailed studies.
Map Your Site NowWhy map my site?
- Get an instant preliminary assessment of your site's constraints.
- Understand flood risk zones before investing in detailed studies.
- Identify potential planning issues early in your project.
- Receive a tailored quote based on your actual site boundaries.
- No obligation, completely free to use.
Frequently asked questions
- How much does a flood risk assessment cost?
- Costs vary depending on the site's flood zone, complexity, and whether hydraulic modelling is required. A straightforward FRA for a small site in Flood Zone 2 will cost less than a multi-source assessment requiring bespoke modelling. We provide fixed-fee quotes after reviewing your site.
- Do I need a flood risk assessment for an extension?
- You may need one if your property is in Flood Zone 2 or 3, or if the extension increases the building footprint in an area with known surface water flood risk. Your local planning authority will confirm whether an FRA is required as part of the application.
- How long does a flood risk assessment take?
- We typically deliver FRAs within 5 to 10 working days from receiving site information and Environment Agency data. Complex sites requiring hydraulic modelling or detailed mitigation design may take longer, but we confirm timescales upfront.
- What is included in a flood risk assessment?
- An FRA evaluates all sources of flooding — rivers, tidal, surface water, groundwater, and sewers — against national and local planning policy. It includes a site-specific risk analysis, climate change allowances, safe access and egress assessment, and mitigation recommendations where required.
- Can I do my own flood risk assessment?
- Technically there is no legal requirement for an FRA to be prepared by a qualified professional, but planning authorities expect reports to follow NPPF guidance and demonstrate competent technical analysis. We recommend using a specialist to avoid delays caused by objections or requests for further information.